He was confronted by team-mates on their return to the changing room as tempers flared.

But Wenger said: "I'm not aware, nothing happened."

Sanchez was left out of the starting line-up at Anfield but came on and set up a goal for his side in the second half as Arsenal lost 3-1.

"I explained after the game I decided to go for a more direct option - that was the unique reason for my decision," said Wenger.

"He is a committed player and sometimes with excessive behaviours but you have had that many times in the history of every squad."

Wenger was speaking before the second leg of his side's Champions League last-16 tie on Tuesday at home to Bayern Munich, who lead 5-1.

Asked about his relationship with the 28-year-old, the Frenchman said: "Honest and normal like with every single player."

Alexis Sanchez posted this picture and message on Instagram saying 'The only failure is not trying'

Sanchez took a full part in Arsenal's training session before the game.

After training a picture was posted on Sanchez's Instagram page with the message: "The true warrior fights not because he hates the ones in front of him, but because he loves those behind him. Let's go Gunners. 'The only failure is not trying.'"

Sanchez has been directly involved in 26 goals in his 26 league games this season, scoring 17 and assisting nine.